Discussion on impeachment has intensified since Donald Trump assumed office this January, but what do we know about impeachment’s constitutional design and history? Cass Sunstein, professor at Harvard Law School, recently wrote an accessible account of impeachment to separate myth from history.

If use of the impeachment power is an exercise in forward-looking, political judgment, then it is worth thinking carefully about what the downsides might be of refraining to pursue an impeachment inquiry in the face of impeachable offenses